What causes leukaemia?
Doctors are not sure what causes leukaemia. But there are risk factors to be considered. Learn more about the risk factors.
Von Willebrand disease
People with von Willebrand disease have trouble controlling their bleeding because a blood clotting factor is either absent, low or defective.
Causes of mental illness
Researchers are still trying to understand what causes mental illness. It is thought that interactions between certain genetic and environmental factors can increase the risk of mental illness.
What causes lymphoma?
Causes of lymphoma are not known, but you can find out more about risk factors.
Causes of narcissistic personality disorder (NPD)
Although it is not known what causes narcissistic personality disorder (NPD), it is probably a mixture of genes, early childhood experiences and psychological factors.
Causes of schizophrenia
Schizophrenia is a major mental illness. While it can be inherited, the risk is increased by drug abuse and other environmental factors.
Causes of OCD
Research into the causes of obsessive-compulsive disorder (OCD) suggests both stress and environmental factors play a role.
Links to our information partners' articles about blood disorders.
What causes kidney disease?
There are many causes of kidney disease, such as diabetes, painkillers, infection and injury. Learn more about the risk factors for kidney disease.
Cerebral palsy damages the nervous system and muscle control, affecting movement and coordination. While the cause is often unknown, there are risk factors.